Session lasts less than 10 seconds. There is some problem with your ThinLinc system. Please contact your system administartor

[lifeisbinary]

A ThinLinc Server running in Ubuntu18.04. One connect it in another machine use ThinLinc client. He gets a message saying that the connection lasts less than 10 seconds. What should be checked to solve this issue? What are the most common causes?

The content of xinit.log following:

xauth:  file /var/opt/thinlinc/sessions/wf23725/10/Xauthority does not exist
tl-xinit: Waiting for Xserver to accept connections...

Xvnc ThinLinc release 4.17.0 build 3647 - built Jul  2 2024 13:23:03
Copyright (C) 1999-2024 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12013000

(II) Initializing extension VNC-EXTENSION

Tue Jul 30 09:32:53 2024
 vncext:      VNC extension running!
 vncext:      Listening for VNC connections on local interface(s), port 5910
 vncext:      created VNC server for screen 0
(II) Initializing extension Generic Event Extension
(II) Initializing extension SHAPE
(II) Initializing extension MIT-SHM
(II) Initializing extension XInputExtension
(II) Initializing extension XTEST
(II) Initializing extension BIG-REQUESTS
(II) Initializing extension SYNC
(II) Initializing extension XKEYBOARD
(II) Initializing extension XC-MISC
(II) Initializing extension XFIXES
(II) Initializing extension RENDER
(II) Initializing extension RANDR
(II) Initializing extension COMPOSITE
(II) Initializing extension DAMAGE
(II) Initializing extension MIT-SCREEN-SAVER
(II) Initializing extension DOUBLE-BUFFER
(II) Initializing extension RECORD
(II) Initializing extension DPMS
(II) Initializing extension Present
(II) Initializing extension DRI3
(II) Initializing extension X-Resource
(II) Initializing extension XVideo
(II) Initializing extension XVideo-MotionCompensation
(II) Initializing extension GLX
(II) IGLX: Loaded and initialized swrast
(II) GLX: Initialized DRISWRAST GL provider for screen 0
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported high keycode 372 for name <I372> ignored
>                   X11 cannot support keycodes above 255.
>                   This warning only shows for the first high keycode.
Errors from xkbcomp are not fatal to the X server
 Connections: accepted: 127.0.0.1::46046
 VNCSConnST:  closing 127.0.0.1::46046: read: Connection reset by peer (104)
 EncodeManager: Framebuffer updates: 0
 EncodeManager:   Total: 0 rects, 0 pixels
 EncodeManager:          0 B (1:-nan ratio)
 Connections: closed: 127.0.0.1::46046
 ComparingUpdateTracker: 0 pixels in / 0 pixels out
 ComparingUpdateTracker: (1:-nan ratio)
tl-xinit: Xserver ready for clients.
--- System information ---
ThinLinc 4.17.0
Linux adrdc-HP-Z8-G4-Workstation 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 18.04.6 LTS \n \l

No LSB modules are available.
--- End system information ---
 Connections: accepted: 127.0.0.1::46058
 SConnection: Client needs protocol version 3.8
 SConnection: Client requests security type VncAuth(2)
 VNCSConnST:  Replacing existing connection
 VNCSConnST:  Server default pixel format depth 24 (32bpp) little-endian rgb888
Running /opt/thinlinc/etc/xstartup.d/01-tl-kinit.sh (Obtaining Kerberos ticket)
Running /opt/thinlinc/etc/xstartup.d/02-tl-dbus-launch.sh (Starting session D-Bus server)
Existing session D-Bus server found.
Setting initial D-Bus and systemd environment...
Running /opt/thinlinc/etc/xstartup.d/03-tl-x11-allow-localuser
localuser:wf23725 being added to access control list
Running /opt/thinlinc/etc/xstartup.d/11-tl-set-title (Setting client window title)
Running /opt/thinlinc/etc/xstartup.d/12-tl-default-keyboard (Configuring default keyboard layout)
Setting default keyboard layout to "us"
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported high keycode 372 for name <I372> ignored
>                   X11 cannot support keycodes above 255.
>                   This warning only shows for the first high keycode.
Errors from xkbcomp are not fatal to the X server
Running /opt/thinlinc/etc/xstartup.d/15-tl-shadow-notify (Enabling notifications when the session is shadowed)
Running /opt/thinlinc/etc/xstartup.d/20-tl-select-profile.sh (Choosing a profile)
Running /opt/thinlinc/etc/xstartup.d/30-tl-xdg-user-dirs (Translating standard folders)
Running /opt/thinlinc/etc/xstartup.d/40-tl-mount-localdrives (Mounting local drives)
Running /opt/thinlinc/etc/xstartup.d/41-tl-lp-redir-launch (Setting up printer port redirection)
Running /opt/thinlinc/etc/xstartup.d/43-tl-pulseaudio-launch.sh (Starting session PulseAudio server)
W: [pulseaudio] main.c: Couldn't canonicalize binary path, cannot self execute.
Session PulseAudio server started. Redirecting applications...
Running /opt/thinlinc/etc/xstartup.d/50-tl-wait-smartcard (Waiting for smart card connection)
Stopping initial window manager...
Done.
Executing profile: ubuntu
Using XDG session: ubuntu
Updating D-Bus and systemd environment...
Executing XDG session command: env GNOME_SHELL_SESSION_MODE=ubuntu gnome-session --session=ubuntu
Profile command exited with exit code 0
Running /opt/thinlinc/etc/xlogout.d/tl-kdestroy.sh

Any help would be appreciated.

[aaron]

Hi @lifeisbinary, welcome to the forum.

I can’t find any clues in the log file, are you sure this is the entire file? In general Ubuntu 18.04 is quite old now. This should not affect ThinLinc in theory, but it’s unlikely that it has been tested on this distribution for some time. If you’re unable to upgrade to a more recent version, perhaps you could try using a more lightweight desktop environment, such as MATE or XFCE. For more information about which desktop enviroments to use in ThinLinc, see:

Which desktop environment should I use with ThinLinc?

ThinLinc supports multiple desktop environments (DEs) through its profile chooser functionality. Where multiple desktop environments (or profiles) are made available by the administrator, users may be presented with a choice during login. Which profiles, if any, the user gets to choose from will depend on certain conditions determined by the administrator. Each profile may provide a different desktop environment, or perhaps even different configurations of the same desktop environment, each suit…

Let me know if this helps.

[lifeisbinary]

Hi @aaron , you are right. It works when connecting MATE desktop environment.
Thanks for your immediate replay.

You and your team are professional!
Good job for your work. I like this software .

[aaron]

Thanks for the kind feedback, glad to hear that MATE works for you; it’s
a popular choice for ThinLinc users. If you need anything else then
don’t hesitate to ask.